插件開發：視圖插件中的按鈕組合

Question

我正在使用zest創建顯示圖形的插件。我正在嘗試創建刷新插件的按鈕。按鈕正在工作，我也在視圖中看到圖形。但是，按鈕在視圖中佔用了大量空間，並限制了圖形的位置。我希望按鈕能夠限制圖形的位置。我該如何解決它？由於]

public void createPartControl(Composite parent) { 

    //create refresh button 

    Composite container = new Composite(parent, SWT.NONE); 

    container.setLayout(new GridLayout(1, false)); 
    Button btnMybutton = new Button(container, SWT.PUSH); 
    btnMybutton.setBounds(0, 10, 75, 25); 
    btnMybutton.setText("Refresh Graph"); 
    btnMybutton.addSelectionListener(new SelectionListener() { 

     @Override 
     public void widgetSelected(SelectionEvent e) { 
     init(); 
     } 

     @Override 
     public void widgetDefaultSelected(SelectionEvent e) { 
     // TODO Auto-generated method stub 
     } 
    }); 

    // Graph will hold all other objects 
    graph = new Graph(parent, SWT.NONE); 
} 

Answer 1

如果你想顯示在圖上頂部的按鈕，你應該使用的FormLayout代替GridLayout：用`GridLayout`

public void createPartControl(Composite parent) { 

    //create refresh button 

    Composite container = new Composite(parent, SWT.NONE); 
    container.setLayout(new FormLayout()); // Use FormLayout instead of GridLayout 

    Button btnMybutton = new Button(container, SWT.PUSH); 
    // btnMybutton.setBounds(0, 10, 75, 25); This line is unnecessary 

    // Assign the right FormData to the button 
    FormData formData = new FormData(); 
    formData.left = new FormAttachment(0, 5); 
    formData.top = new FormAttachment(0, 5); 
    btnMybutton.setLayoutData(formData); 

    btnMybutton.setText("Refresh Graph"); 
    // Use SelectionAdapter instead of SelectionListener 
    // (it's not necessary but saves a few lines of code) 
    btnMybutton.addSelectionListener(new SelectionAdapter() { 
     @Override 
     public void widgetSelected(SelectionEvent e) { 
     init(); 
     } 
    }); 

    // Graph will hold all other objects 
    graph = new Graph(container, SWT.NONE); // Note parent changed to container 

    // Assignt the right FormData to the graph 
    FormData formData2 = new FormData(); 
    formData2.left = new FormAttachment(0, 0); 
    formData2.top = new FormAttachment(0, 0); 
    formData2.right = new FormAttachment(100, 0); 
    formData2.bottom = new FormAttachment(100, 0); 
    graph.setLayoutData(formData2); 
}